TM-9-2350-358-BD
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A6
TECHNICAL MANUAL; OPERATOR’S, UNIT, AND DIRECT SUPPORT SUPPORT MAINTENANCE
MARCH 1994
TM-9-2350-358-BD - Page 220 of 343
TM 9-2350-358-BD
11-2.
ASSESSMENT PROCEDURE - CONTINUED
Table 11-2. Hydraulic System Operation Assessment
ATTEMPT OPERATION
INOPERATIVE:
Mode selector valve .
...................................................
para 11-15
Hydraulic fuze manifold.
..............................................
para 11-15
Manual elevation hand pump.
.....................................
para 11-15
Equilibration hand pump .
............................................
para 11-15
Determine if:
No problem found
Damage can be repaired
Damage cannot be repaired
- Note repair requirements
- Note extent of damage repair
requirements
Go to Table 2-3 Evaluation of
Performance Capability
Operation observation is complete.
Return
to Table 2-2 to continue operation assessment.
11-3.
REPAIR PROCEDURE INDEX
PARA
Hydraulic fluid substitution.
......................................................................................................................................
11-6
Preformed packing leakage .
...................................................................................................................................
11-7
Metal tube bending.
.................................................................................................................................................
11-9
Hydraulic tube and hose repairs (low pressure). .
....................................................................................................
11-10
Hydraulic tube and hose repairs (high pressure) .
...................................................................................................
11-11
Hydraulic high-pressure tubing repairs (permaswaging).
........................................................................................
11-12
Hydraulic tube and hose Isolation .
..........................................................................................................................
11-13
Mode selector valve isolation
. .
..............................................................................................................................
11-15
Hydraulic fuze manifold isolation. .
...........................................................................................................................
11-15
Equilibration hand pump isolation. .
..........................................................................................................................
.
11-15
Manual elevation hand pump isolation .
...................................................................................................................
11-15
Manual elevation and equilibration hand pumps isolation .
......................................................................................
11-15
SECTION II.
PROCEDURAL INFORMATION
11-4.
GENERAL
BDAR for a hydraulic system is generally confined to component replacement, expedient line repairs, or bypassing
damaged lines.
If a hydraulic circuit cannot be repaired, it may be necessary to isolate it (cutting it off) from the system to
permit operation of some other hydraulic functions.
Damage to the hydraulic system almost always requires
replenishment of lost fluids.
11-2
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